| 7306.30.50 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn | kg |  |  |  | 
| 7306.30.50 | 25 | With an outside diameter not exceeding 114.3 mm: |  |  |  |  | 
| 7306.40.50 | 15 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn | kg |  |  |  | 
| 7306.40.50 | 62 | With an outside diameter not exceeding 114.3 mm: |  |  |  |  | 
| 7306.40.50 | 85 | With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm: |  |  |  |  | 
| 7306.50.50 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn | kg |  |  |  | 
| 7306.50.50 | 50 | With an outside diameter not exceeding 114.3 mm | kg |  |  |  | 
| 7306.50.50 | 70 | With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm | kg |  |  |  | 
| 7307.91.50 | 10 | With an inside diameter of less than 360 mm: |  |  |  |  | 
| 7307.91.50 | 50 | With an inside diameter of 360 mm or more: |  |  |  |  | 
| 7307.93.30 |  | With an inside diameter of less than 360 mm: |  |  |  |  | 
| 7307.93.90 |  | With an inside diameter of 360 mm or more |  | 4.3% | Free (A,AU,B,BH, CA,CL,E,IL,J,JO, MA,MX, P,SG) | 45% | 
| 7308.90.95 | 30 | Sheet-metal roofing, siding, flooring and roof drainage equipment | kg |  |  |  | 
| 7309.00.00 |  | Reservoirs, tanks, vats and similar containers for any material (other than compressed or liquefied gas), of iron or steel, of a capacity exceeding 300 liters, whether or not lined or heat insulated, but not fitted with mechanical or thermal equipment |  | Free |  | 45% | 
| 7310 |  | Tanks, casks, drums, cans, boxes and similar containers, for any material (other than compressed or liquefied gas), of iron or steel, of a capacity not exceeding 300 liters, whether or not lined or heat insulated, but not fitted with mechanical or thermal equipment: |  |  |  |  | 
| 7310.21.00 | 25 | Containers, of circular cross section, of a volume capacity between 11.4 liters and 26.6 liters, of a kind used for the conveyance of goods | No. |  |  |  | 
| 7310.29.00 | 25 | Containers, of circular cross section, of a volume capacity between 11.4 liters and 26.6 liters, of a kind used for the conveyance of goods | No. |  |  |  | 
| 7311.00.00 | 30 | Certified prior to exportation to have been made in accordance with the safety requirements of sections 178.36 through 178.68 of title 49 CFR or under a specific exemption to those requirements: |  |  |  |  | 
| 7312.10.10 | 50 | Other, stranded wire having a lay or twist of not more than 1 revolution for a length equal to the strand diameter multiplied by 8.5 | kg |  |  |  | 
| 7312.10.30 | 10 | For prestressing concrete: |  |  |  |  | 
| 7312.10.30 | 10 | Covered with textile or other non- metallic material | kg |  |  |  | 
| 7312.10.30 | 20 | Other, stranded wire having a lay or twist of not more than 1 revolution for a length equal to the strand diameter multiplied by 8.5 | kg |  |  |  | 
| 7312.10.30 | 70 | Covered with textile or other nonmetallic material | kg |  |  |  | 
| 7312.10.60 | 30 | With a diameter not exceeding 9.5 mm | kg |  |  |  | 
| 7312.10.90 | 30 | With a diameter not exceeding 9.5 mm | kg |  |  |  |